etc-server/bitlbee/: BitlBee IRC gateway

BitlBee (https://www.bitlbee.org/) is an IRC gateway to other chat networks. Once installed, it seems good to restrict BitlBee to listen only on the loopback interface. Modify /etc/bitlbee/bitlbee.conf:

[settings]
## RunMode:
##
##  Inetd -- Run from inetd (default)
##  Daemon -- Run as a stand-alone daemon, serving all users from one process.
##    This saves memory if there are more users, the downside is that when one
##    user hits a crash-bug, all other users will also lose their connection.
##  ForkDaemon -- Run as a stand-alone daemon, but keep all clients in separate
##    child processes. This should be pretty safe and reliable to use instead
##    of inetd mode.
##
# RunMode = Inetd
RunMode = ForkDaemon

## DaemonPort/DaemonInterface:
##
## For daemon mode, you can specify on what interface and port the daemon
## should be listening for connections.
##
## DEBIAN NOTE: The init script passes the -p flag to use the port number
## set using debconf, this overrides the DaemonPort setting here.
##
# DaemonInterface = 0.0.0.0
# DaemonPort = 6667
DaemonInterface = 127.0.0.1

Then, start BitlBee daemon and connect to the IRC gateway, for example with WeeChat:

# Configure the server and connect to it
/server add bitlbee localhost/6667 -autoconnect
/connect bitlbee

# Register the account in BitlBee control channel
register <password>

# In WeeChat, save the password
/secure set bitlbee_password <password>
/set irc.server.bitlbee.command "/msg &bitlbee identify ${sec.data.bitlbee_password}"

Then, in BitlBee control channel (&bitlbee), add a Twitter account for example (https://wiki.bitlbee.org/HowtoTwitter):

account add twitter <yourusername>

# Force using commands in order to post a new tweet
account twitter set commands strict

# Disable streams (cf. https://wiki.bitlbee.org/HowtoTwitter/StreamDeprecation)
account twitter set stream off

# Connect to Twitter
account twitter on

# Follow an other Twitter account
add twitter <twitter_username_to_follow>